Charisma compacta
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| Charisma compacta | |
|---|---|
 | |
| Original image of a shell of Charisma compacta | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Charisma |
| Species: | C. compacta |
| Binomial name | |
| Charisma compacta Hedley, 1915 | |
Charisma compacta is a species of extremely small sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[1]
The height of the shell attains 1.9 mm, its diameter 2 mm. The shell is solid and has a turbinate shape. Its colour is pale cream. The four whorls are rather loosely coiled and separated by channelled sutures. The spire-whorls are smooth. The body whorl is sculptured with about twenty regularly spaced, sharp, spiral grooves. The umbilicus measures about one-eighth of the shell's diameter; its margin is smooth and rounded. The aperture-side of the umbilicus shows an obscure funicle. The circular aperture of the shell is descending. The inner lip is slightly expanded. The outer lip is simple.[2]